package cn.cy.websocket;

import cn.cy.domain.Const.WebsocketConst;
import cn.cy.domain.WebsocketEnity;
import cn.cy.service.WsLowerCom;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArraySet;

/**
 * @author: Xucranger
 * @description: TODO
 * @date: 22/5/4 19:35
 * @ ServerEndpoint 注解是一个类层次的注解，它的功能主要是将目前的类定义成一个websocket服务器端,
 * 注解的值将被用于监听用户连接的终端访问URL地址,客户端可以通过这个URL来连接到WebSocket服务器端
 */
@Component
@Slf4j
@Service
@ServerEndpoint("/api/websocket/{sid}")
public class WebSocketServer {
    @Autowired
    WsLowerCom wsLowerCom;

    public static final String frontsid = WebsocketConst.Frontsid;
    public static final String idcardsid = WebsocketConst.Idcardsid;
    public static final String lowersid = WebsocketConst.Lowersid;


    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static final CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据

    private WebsocketEnity websocketEnity = new WebsocketEnity();
    private Session session;

    //接收sid
    private String sid = "";

    private String tosid = "";

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {

        if(sid.equals(frontsid)){
            tosid = lowersid;
        }
        else {
            tosid = frontsid;
        }
        this.websocketEnity = new WebsocketEnity(session,sid,tosid);
//        ArrayList<String> tosids = websockettolist.getByKey(sid);
//
//        this.websocketEnity.setTosids(tosids);
        log.info(this.websocketEnity.getTosid());
//        this.session = session;
        webSocketSet.add(this);     //加入set中
//        this.sid = sid;
        addOnlineCount();           //在线数加1
        try {
            sendMessage("conn_success");
            log.info("有新窗口开始监听:" + sid + ",当前在线人数为:" + getOnlineCount());
        } catch (IOException e) {
            log.error("websocket IO Exception");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        //断开连接情况下，更新主板占用情况为释放
        log.info("释放的sid为："+this.websocketEnity.getSid());
        //这里写你 释放的时候，要处理的业务
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());

    }

    /**
     * 收到客户端消息后调用的方法
     * @ Param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) throws IOException {

        //收到消息
        log.info("收到来自窗口" + this.websocketEnity.getSid() + "的信息:" + message);
        //如果消息来自读卡器，需要过滤
        if(this.websocketEnity.getSid().equals(idcardsid)){

        }
        //如果消息来自下位机，说明运动成功，交给wslowerserver处理
        else if (this.websocketEnity.getSid().equals(lowersid)){
            //这里的message只返回status即可，具体说明放在了下面的函数里👇
            wsLowerCom.getResult(message);
        }
        //转发消息
        sendMsg(message,this.websocketEnity.getTosid());

    }

    /**
     * @ Param session
     * @ Param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送
     */
    public void sendMessage(String message) throws IOException {
        System.out.println(message);
        this.websocketEnity.getSession().getBasicRemote().sendText(message);
    }

    /**
     * 群发自定义消息
     */
    public static void sendInfo(String message, @PathParam("sid") String sid) throws IOException {
        log.info("推送消息到窗口" + sid + "，推送内容:" + message);

        for (WebSocketServer item : webSocketSet) {
            try {
                //这里可以设定只推送给这个sid的，为null则全部推送
                if (sid == null) {
//                    item.sendMessage(message);
                } else if (item.websocketEnity.getSid().equals(sid)) {
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    /**
     * @author: Xucranger
     * @description: 根据sid来发送一对一消息
     * @date: 22/5/4 23:44
     */

    public static void sendMsg(String message,@PathParam("sid") String  Tosid ) throws IOException{

        for (WebSocketServer item : webSocketSet) {
            try {
                if (Tosid == null) {
                    //null
                }
                else if (item.websocketEnity.getSid().equals(Tosid)) {
                    log.info("推送消息到窗口" + Tosid + "，推送内容:" + message);
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        if(WebSocketServer.onlineCount>0){
            WebSocketServer.onlineCount--;
        }
    }

    public static CopyOnWriteArraySet<WebSocketServer> getWebSocketSet() {
        return webSocketSet;
    }
}
